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Theorem lcmineqlem2 42522

Description: Part of lcm inequality lemma, this part eventually shows that F times the least common multiple of 1 to n is an integer. (Contributed by metakunt, 29-Apr-2024.)

**Hypotheses**
Ref	Expression
lcmineqlem2.1	⊢ 𝐹 = ∫(0[,]1)((𝑥↑(𝑀 − 1)) · ((1 − 𝑥)↑(𝑁 − 𝑀))) d𝑥
lcmineqlem2.2	⊢ (𝜑 → 𝑁 ∈ ℕ)
lcmineqlem2.3	⊢ (𝜑 → 𝑀 ∈ ℕ)
lcmineqlem2.4	⊢ (𝜑 → 𝑀 ≤ 𝑁)

**Assertion**
Ref	Expression
lcmineqlem2	⊢ (𝜑 → 𝐹 = Σ𝑘 ∈ (0...(𝑁 − 𝑀))(((-1↑𝑘) · ((𝑁 − 𝑀)C𝑘)) · ∫(0[,]1)((𝑥↑(𝑀 − 1)) · (𝑥↑𝑘)) d𝑥))

Distinct variable groups: 𝑘,𝑀,𝑥 𝑘,𝑁,𝑥 𝜑,𝑘,𝑥 Allowed substitution hints: 𝐹(𝑥,𝑘)

**Proof of Theorem lcmineqlem2**
Step	Hyp	Ref	Expression
1		lcmineqlem2.1	. . 3 ⊢ 𝐹 = ∫(0[,]1)((𝑥↑(𝑀 − 1)) · ((1 − 𝑥)↑(𝑁 − 𝑀))) d𝑥
2		lcmineqlem2.2	. . 3 ⊢ (𝜑 → 𝑁 ∈ ℕ)
3		lcmineqlem2.3	. . 3 ⊢ (𝜑 → 𝑀 ∈ ℕ)
4		lcmineqlem2.4	. . 3 ⊢ (𝜑 → 𝑀 ≤ 𝑁)
5	1, 2, 3, 4	lcmineqlem1 42521	. 2 ⊢ (𝜑 → 𝐹 = ∫(0[,]1)((𝑥↑(𝑀 − 1)) · Σ𝑘 ∈ (0...(𝑁 − 𝑀))(((-1↑𝑘) · ((𝑁 − 𝑀)C𝑘)) · (𝑥↑𝑘))) d𝑥)
6		eqid 2740	. . 3 ⊢ (0[,]1) = (0[,]1)
7		fzfid 13933	. . 3 ⊢ (𝜑 → (0...(𝑁 − 𝑀)) ∈ Fin)
8		0red 11145	. . 3 ⊢ (𝜑 → 0 ∈ ℝ)
9		1red 11143	. . 3 ⊢ (𝜑 → 1 ∈ ℝ)
10		unitsscn 13451	. . . . 5 ⊢ (0[,]1) ⊆ ℂ
11		resmpt 5996	. . . . 5 ⊢ ((0[,]1) ⊆ ℂ → ((𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ↾ (0[,]1)) = (𝑥 ∈ (0[,]1) ↦ (𝑥↑(𝑀 − 1))))
12	10, 11	ax-mp 5	. . . 4 ⊢ ((𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ↾ (0[,]1)) = (𝑥 ∈ (0[,]1) ↦ (𝑥↑(𝑀 − 1)))
13		nnm1nn0 12476	. . . . 5 ⊢ (𝑀 ∈ ℕ → (𝑀 − 1) ∈ ℕ₀)
14		expcncf 24918	. . . . 5 ⊢ ((𝑀 − 1) ∈ ℕ₀ → (𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ∈ (ℂ–cn→ℂ))
15		rescncf 24889	. . . . . 6 ⊢ ((0[,]1) ⊆ ℂ → ((𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ∈ (ℂ–cn→ℂ) → ((𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ↾ (0[,]1)) ∈ ((0[,]1)–cn→ℂ)))
16	10, 15	ax-mp 5	. . . . 5 ⊢ ((𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ∈ (ℂ–cn→ℂ) → ((𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ↾ (0[,]1)) ∈ ((0[,]1)–cn→ℂ))
17	3, 13, 14, 16	4syl 19	. . . 4 ⊢ (𝜑 → ((𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ↾ (0[,]1)) ∈ ((0[,]1)–cn→ℂ))
18	12, 17	eqeltrrid 2845	. . 3 ⊢ (𝜑 → (𝑥 ∈ (0[,]1) ↦ (𝑥↑(𝑀 − 1))) ∈ ((0[,]1)–cn→ℂ))
19		elfznn0 13572	. . . . . 6 ⊢ (𝑘 ∈ (0...(𝑁 − 𝑀)) → 𝑘 ∈ ℕ₀)
20		neg1cn 12142	. . . . . . 7 ⊢ -1 ∈ ℂ
21		expcl 14039	. . . . . . 7 ⊢ ((-1 ∈ ℂ ∧ 𝑘 ∈ ℕ₀) → (-1↑𝑘) ∈ ℂ)
22	20, 21	mpan 696	. . . . . 6 ⊢ (𝑘 ∈ ℕ₀ → (-1↑𝑘) ∈ ℂ)
23	19, 22	syl 17	. . . . 5 ⊢ (𝑘 ∈ (0...(𝑁 − 𝑀)) → (-1↑𝑘) ∈ ℂ)
24	23	adantl 482	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 𝑀))) → (-1↑𝑘) ∈ ℂ)
25	3	nnnn0d 12496	. . . . . . . 8 ⊢ (𝜑 → 𝑀 ∈ ℕ₀)
26	2	nnnn0d 12496	. . . . . . . 8 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
27		nn0sub 12485	. . . . . . . 8 ⊢ ((𝑀 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ₀) → (𝑀 ≤ 𝑁 ↔ (𝑁 − 𝑀) ∈ ℕ₀))
28	25, 26, 27	syl2anc 590	. . . . . . 7 ⊢ (𝜑 → (𝑀 ≤ 𝑁 ↔ (𝑁 − 𝑀) ∈ ℕ₀))
29	4, 28	mpbid 233	. . . . . 6 ⊢ (𝜑 → (𝑁 − 𝑀) ∈ ℕ₀)
30		nn0z 12546	. . . . . . . 8 ⊢ (𝑘 ∈ ℕ₀ → 𝑘 ∈ ℤ)
31	19, 30	syl 17	. . . . . . 7 ⊢ (𝑘 ∈ (0...(𝑁 − 𝑀)) → 𝑘 ∈ ℤ)
32		bccl 14282	. . . . . . 7 ⊢ (((𝑁 − 𝑀) ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → ((𝑁 − 𝑀)C𝑘) ∈ ℕ₀)
33	31, 32	sylan2 599	. . . . . 6 ⊢ (((𝑁 − 𝑀) ∈ ℕ₀ ∧ 𝑘 ∈ (0...(𝑁 − 𝑀))) → ((𝑁 − 𝑀)C𝑘) ∈ ℕ₀)
34	29, 33	sylan 586	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 𝑀))) → ((𝑁 − 𝑀)C𝑘) ∈ ℕ₀)
35	34	nn0cnd 12498	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 𝑀))) → ((𝑁 − 𝑀)C𝑘) ∈ ℂ)
36	24, 35	mulcld 11163	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 𝑀))) → ((-1↑𝑘) · ((𝑁 − 𝑀)C𝑘)) ∈ ℂ)
37		resmpt 5996	. . . . . 6 ⊢ ((0[,]1) ⊆ ℂ → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ↾ (0[,]1)) = (𝑥 ∈ (0[,]1) ↦ (𝑥↑𝑘)))
38	10, 37	ax-mp 5	. . . . 5 ⊢ ((𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ↾ (0[,]1)) = (𝑥 ∈ (0[,]1) ↦ (𝑥↑𝑘))
39		expcncf 24918	. . . . . . 7 ⊢ (𝑘 ∈ ℕ₀ → (𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ∈ (ℂ–cn→ℂ))
40	19, 39	syl 17	. . . . . 6 ⊢ (𝑘 ∈ (0...(𝑁 − 𝑀)) → (𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ∈ (ℂ–cn→ℂ))
41		rescncf 24889	. . . . . . 7 ⊢ ((0[,]1) ⊆ ℂ → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ∈ (ℂ–cn→ℂ) → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ↾ (0[,]1)) ∈ ((0[,]1)–cn→ℂ)))
42	10, 41	ax-mp 5	. . . . . 6 ⊢ ((𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ∈ (ℂ–cn→ℂ) → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ↾ (0[,]1)) ∈ ((0[,]1)–cn→ℂ))
43	40, 42	syl 17	. . . . 5 ⊢ (𝑘 ∈ (0...(𝑁 − 𝑀)) → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ↾ (0[,]1)) ∈ ((0[,]1)–cn→ℂ))
44	38, 43	eqeltrrid 2845	. . . 4 ⊢ (𝑘 ∈ (0...(𝑁 − 𝑀)) → (𝑥 ∈ (0[,]1) ↦ (𝑥↑𝑘)) ∈ ((0[,]1)–cn→ℂ))
45	44	adantl 482	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 𝑀))) → (𝑥 ∈ (0[,]1) ↦ (𝑥↑𝑘)) ∈ ((0[,]1)–cn→ℂ))
46	6, 7, 8, 9, 18, 36, 45	3factsumint 42517	. 2 ⊢ (𝜑 → ∫(0[,]1)((𝑥↑(𝑀 − 1)) · Σ𝑘 ∈ (0...(𝑁 − 𝑀))(((-1↑𝑘) · ((𝑁 − 𝑀)C𝑘)) · (𝑥↑𝑘))) d𝑥 = Σ𝑘 ∈ (0...(𝑁 − 𝑀))(((-1↑𝑘) · ((𝑁 − 𝑀)C𝑘)) · ∫(0[,]1)((𝑥↑(𝑀 − 1)) · (𝑥↑𝑘)) d𝑥))
47	5, 46	eqtrd 2775	1 ⊢ (𝜑 → 𝐹 = Σ𝑘 ∈ (0...(𝑁 − 𝑀))(((-1↑𝑘) · ((𝑁 − 𝑀)C𝑘)) · ∫(0[,]1)((𝑥↑(𝑀 − 1)) · (𝑥↑𝑘)) d𝑥))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 207 ∧ wa 396 = wceq 1547 ∈ wcel 2119 ⊆ wss 3890 class class class wbr 5079 ↦ cmpt 5160 ↾ cres 5627 (class class class)co 7363 ℂcc 11034 0cc0 11036 1c1 11037 · cmul 11041 ≤ cle 11178 − cmin 11375 -cneg 11376 ℕcn 12172 ℕ₀cn0 12435 ℤcz 12522 [,]cicc 13299 ...cfz 13459 ↑cexp 14021 Ccbc 14262 Σcsu 15646 –cn→ccncf 24868 ∫citg 25610

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2712 ax-rep 5206 ax-sep 5225 ax-nul 5235 ax-pow 5301 ax-pr 5369 ax-un 7685 ax-inf2 9560 ax-cc 10355 ax-cnex 11092 ax-resscn 11093 ax-1cn 11094 ax-icn 11095 ax-addcl 11096 ax-addrcl 11097 ax-mulcl 11098 ax-mulrcl 11099 ax-mulcom 11100 ax-addass 11101 ax-mulass 11102 ax-distr 11103 ax-i2m1 11104 ax-1ne0 11105 ax-1rid 11106 ax-rnegex 11107 ax-rrecex 11108 ax-cnre 11109 ax-pre-lttri 11110 ax-pre-lttrn 11111 ax-pre-ltadd 11112 ax-pre-mulgt0 11113 ax-pre-sup 11114 ax-addf 11115

This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ne 2936 df-nel 3040 df-ral 3055 df-rex 3065 df-rmo 3345 df-reu 3346 df-rab 3393 df-v 3434 df-sbc 3731 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4269 df-if 4462 df-pw 4538 df-sn 4563 df-pr 4565 df-tp 4567 df-op 4569 df-uni 4846 df-int 4885 df-iun 4930 df-iin 4931 df-disj 5047 df-br 5080 df-opab 5142 df-mpt 5161 df-tr 5187 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-se 5579 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-isom 6501 df-riota 7320 df-ov 7366 df-oprab 7367 df-mpo 7368 df-of 7627 df-ofr 7628 df-om 7814 df-1st 7938 df-2nd 7939 df-supp 8108 df-frecs 8228 df-wrecs 8259 df-recs 8308 df-rdg 8346 df-1o 8402 df-2o 8403 df-oadd 8406 df-omul 8407 df-er 8640 df-map 8772 df-pm 8773 df-ixp 8843 df-en 8891 df-dom 8892 df-sdom 8893 df-fin 8894 df-fsupp 9272 df-fi 9321 df-sup 9352 df-inf 9353 df-oi 9422 df-dju 9823 df-card 9861 df-acn 9864 df-pnf 11179 df-mnf 11180 df-xr 11181 df-ltxr 11182 df-le 11183 df-sub 11377 df-neg 11378 df-div 11806 df-nn 12173 df-2 12242 df-3 12243 df-4 12244 df-5 12245 df-6 12246 df-7 12247 df-8 12248 df-9 12249 df-n0 12436 df-z 12523 df-dec 12643 df-uz 12787 df-q 12897 df-rp 12941 df-xneg 13061 df-xadd 13062 df-xmul 13063 df-ioo 13300 df-ioc 13301 df-ico 13302 df-icc 13303 df-fz 13460 df-fzo 13607 df-fl 13749 df-mod 13827 df-seq 13962 df-exp 14022 df-fac 14234 df-bc 14263 df-hash 14291 df-cj 15059 df-re 15060 df-im 15061 df-sqrt 15195 df-abs 15196 df-limsup 15431 df-clim 15448 df-rlim 15449 df-sum 15647 df-struct 17115 df-sets 17132 df-slot 17150 df-ndx 17162 df-base 17178 df-ress 17199 df-plusg 17231 df-mulr 17232 df-starv 17233 df-sca 17234 df-vsca 17235 df-ip 17236 df-tset 17237 df-ple 17238 df-ds 17240 df-unif 17241 df-hom 17242 df-cco 17243 df-rest 17383 df-topn 17384 df-0g 17402 df-gsum 17403 df-topgen 17404 df-pt 17405 df-prds 17408 df-xrs 17464 df-qtop 17469 df-imas 17470 df-xps 17472 df-mre 17546 df-mrc 17547 df-acs 17549 df-mgm 18606 df-sgrp 18685 df-mnd 18701 df-submnd 18750 df-mulg 19042 df-cntz 19290 df-cmn 19755 df-psmet 21346 df-xmet 21347 df-met 21348 df-bl 21349 df-mopn 21350 df-cnfld 21355 df-top 22884 df-topon 22901 df-topsp 22923 df-bases 22936 df-cn 23217 df-cnp 23218 df-cmp 23377 df-tx 23552 df-hmeo 23745 df-xms 24310 df-ms 24311 df-tms 24312 df-cncf 24870 df-ovol 25456 df-vol 25457 df-mbf 25611 df-itg1 25612 df-itg2 25613 df-ibl 25614 df-itg 25615 df-0p 25662

This theorem is referenced by: lcmineqlem3 42523

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